Patek Philippe Grand Complications Perpetual Calendar (51361G001) self – winding automatic watch, features a 37mm 18k white gold case surrounding a silver dial on an 18k white gold bracelet with a folding buckle. Functions include hours, minutes, date, day, month, moon phase, 24-hour indicator and perpetual calendar. This watch comes complete with the original box and papers. We back this watch with a 2-Year WatchBox warranty!